Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/35-21 | 290/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.58 (725.9) | 30.28 (769) | 1.7 (43.1) 5.9% |
| Width inches (mm) | 10.83 (275) | 11.42 (290) | 0.59 (15) 5.5% |
| Circum. inches (mm) | 89.78 (2280.48) | 95.11 (2415.88) | 5.33 (135.4) 5.9% |
| Sidewall Height inches (mm) | 3.79 (96.25) | 5.14 (130.5) | 1.35 (34.25) 35.6% |
| Revolutions per mile (km) | 705.7 (438.5) | 666.15 (413.93) | -39.55 (-24.58) -5.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.19 mph (34.1 km/h) |
| 25 mph (40.23 km/h) | 26.48 mph (42.62 km/h) |
| 30 mph (48.28 km/h) | 31.78 mph (51.15 km/h) |
| 35 mph (56.33 km/h) | 37.08 mph (59.67 km/h) |
| 40 mph (64.37 km/h) | 42.37 mph (68.2 km/h) |
| 45 mph (72.42 km/h) | 47.67 mph (76.72 km/h) |
| 50 mph (80.47 km/h) | 52.97 mph (85.25 km/h) |
| 55 mph (88.51 km/h) | 58.27 mph (93.77 km/h) |
| 60 mph (96.56 km/h) | 63.56 mph (102.29 km/h) |
| 65 mph (104.61 km/h) | 68.86 mph (110.82 km/h) |
| 70 mph (112.65 km/h) | 74.16 mph (119.34 km/h) |
| 75 mph (120.7 km/h) | 79.45 mph (127.87 km/h) |
| 80 mph (128.75 km/h) | 84.75 mph (136.39 km/h) |
| 85 mph (136.79 km/h) | 90.05 mph (144.92 km/h) |
| 90 mph (144.84 km/h) | 95.34 mph (153.44 km/h) |
| 95 mph (152.89 km/h) | 100.64 mph (161.97 km/h) |
| 100 mph (160.93 km/h) | 105.94 mph (170.49 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1695 | 1969 | 2121 | 2215 | 2316 | 2388 | 2467 | 2561 | 2691 | 2821 | 2965 | 3080 | 3289 | 3520 | 3701 | 3816 | 3881 | 4119 | 4451 | 5172 |
Better Fuel Economy Factory Ratios Increased Power
